$\frac{-4}{5}$ .$\frac{7}{9}$+ $\frac{17}{9}$ $\frac{-1}{5}$ -$\frac{4}{5}$ .$\frac{10}{9}$

0 bình luận về “$\frac{-4}{5}$ .$\frac{7}{9}$+ $\frac{17}{9}$ $\frac{-1}{5}$ -$\frac{4}{5}$ .$\frac{10}{9}$”

1. `(-4)/5. 7/9 + 17/9. (-1)/5 – 4/5. 10/9`

   `= 4/5. (-7)/9 + 17/9. (-1)/5 – 4/5. 10/9`

   `= 4/5. ((-7)/9 – 10/9) + 17/9. (-1)/5`

   `= 4/5. (-17)/9 + 17/9. (-1)/5`

   `= (-4)/5. 17/9 + 17/9. (-1)/5`

   `= 17/9. ((-4)/5 + (-1)/5)`

   `= (-17)/9`

    

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2. Đáp án

   = -28/45 + -17/45 – 40/45

   = -28 + ( -17) + ( -40) / 45

   =  -85/45

   = -9/17

    

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